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Correlation of the 2-10 keV X-ray background with nearby galaxies

AutorCarrera, Francisco J. ; Barcons, Xavier ; Butcher, J. A.; Fabian, A. C.; Lahav, O.; Stewart, G. C.; Warwick, R. S.
Fecha de publicación1995
EditorElsevier
CitaciónAdvances in Space Research 16(3): 111-114 (1995)
ResumenCatalogues of several types of extragalactic objects have been cross-correlated with Ginga measurements of the X-ray background intensity. Some of these catalogues give rise to significant signals, meaning that either sources in them or some other sources clustered around them produce a fraction of the X-ray background. The significance of these results has been established using bootstrap and X-ray background simulations. An expression to infer the local X-ray emissivity from the cross-correlation signal is given and applied to two galaxy catalogues (UGC and IRAS) for which the signal is more significant (>95 per cent). Values of ∼ 1039h ergs−1 Mpc−3 are obtained, implying that ≤ 30 per cent of the X-ray background could be produced by a non-evolving population of galaxies.
URIhttp://hdl.handle.net/10261/169668
Identificadoresdoi: 10.1016/0273-1177(95)00056-K
issn: 0273-1177
e-issn: 1879-1948
Aparece en las colecciones: (IFCA) Artículos
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